so who is to blame for that and will the guilty ever be punished
Blame the terrorists. First and foremost. Especially the two Pakistanis who were directly involved in sheltering the ben mofo laden.
They were familiar with desi style existence, and thus were able to wiggle their way through the system and setup a safe house for ben mofo laden.
Beyond that, it is a lessons learned for pakistani nation.
1. We need to make sure no one can purchase land and build a house with fake IDs
2. When US or other big powers tell us that someone is hiding in our vast territory, we should listen and act
Hope this helps you understand.
I urge you and other Indians, that do not try to throw the baby out with the dirty bath water.
Islamists want to kill Pakistani army and intel folks using this occasion just like they have killed 50,000 already.
And Indians (especially Hindus) should not work as tool in the hand of Islamists.
peace to you.
May you live long and prosper
May you have great spiritual experience during this holy month.
Amen